Find the answer to the math problem. Determine the place value that is necessary for the problem. The place value is the last digit to the right of the decimal point or, if there is no decimal point, the first number to the left. This is somewhat up to your instructor and the subject matter. For example, in the sciences, it is likely the place value will be two or three digits away from the decimal while in measurements, it may only be one.
Determine whether the number directly to the right of the place value you are rounding to is above or below 5.
Add one to the place value digit if the number to the right is above 5. Leave the number the same if the number is below 5. Change all of the numbers after the number you changed to zero. For example, if you are asked to round to the nearest ten in the number 1,267, then the answer will be 1,270. If you are asked to round to the nearest hundred in 12,346, then the answer will be 12,300.